#ifndef _GNU_SOURCE

#define _GNU_SOURCE 1

#endif

#include <string.h>

#include "test.h"

#define N(s, tail, sub) { \

	char *p = s tail; \

	char *q = memmem(p, strlen(s), sub, strlen(sub)); \

	if (q) \

		t_error("memmem("#s" "#tail", %d, "#sub", %d) returned str+%d, wanted 0\n",\

			strlen(s), strlen(sub), q-p); \

}

#define T(s, sub, n) { \

	char *p = s; \

	char *q = memmem(p, strlen(p), sub, strlen(sub)); \

	if (q == 0) \

		t_error("memmem(%s,%s) returned 0, wanted str+%d\n", #s, #sub, n); \

	else if (q - p != n) \

		t_error("memmem(%s,%s) returned str+%d, wanted str+%d\n", #s, #sub, q-p, n); \

}

int main(void)

{

	N("","a", "a")

	N("a","a", "aa")

	N("a","b", "b")

	N("aa","b", "ab")

	N("aa","a", "aaa")

	N("aba","b", "bab")

	N("abba","b", "bab")

	N("abba","ba", "aba")

	N("abc abc","d", "abcd")

	N("0-1-2-3-4-5-6-7-8-9","", "-3-4-56-7-8-")

	N("0-1-2-3-4-5-6-7-8-9","", "-3-4-5+6-7-8-")

	N("_ _ _\xff_ _ _","\x7f_", "_\x7f_")

	N("_ _ _\x7f_ _ _","\xff_", "_\xff_")

	T("", "", 0)

	T("abcd", "", 0)

	T("abcd", "a", 0)

	T("abcd", "b", 1)

	T("abcd", "c", 2)

	T("abcd", "d", 3)

	T("abcd", "ab", 0)

	T("abcd", "bc", 1)

	T("abcd", "cd", 2)

	T("ababa", "baba", 1)

	T("ababab", "babab", 1)

	T("abababa", "bababa", 1)

	T("abababab", "bababab", 1)

	T("ababababa", "babababa", 1)

	T("abbababab", "bababa", 2)

	T("abbababab", "ababab", 3)

	T("abacabcabcab", "abcabcab", 4)

	T("nanabanabanana", "aba", 3)

	T("nanabanabanana", "ban", 4)

	T("nanabanabanana", "anab", 1)

	T("nanabanabanana", "banana", 8)

	T("_ _\xff_ _", "_\xff_", 2)

	return t_status;

}